Friction-clutch.



6w 0 9 l om v L U D E T N E T A P R E L L U M A R 5 nu A: 2 00 0 N FRICTION CLUTCH.

APPLIGATION FILED JULY 3. 1905.

INVENTOR.

WITNESSES.-

MM M a.

UNITED sTAr s PATENT enrich KING MACHINE TOOL COMPANY,

CORPORATION or OHIO.

OF WINTON PLACE, OHIO, A

FRICTION-CLUTCH.

Specification of Letters Patent.

Patented July 3. 1906.

Application filed July 3,1905. Serial No. 268,134.

To all? whmn, it um concern/.-

Be it known that l, EDWARD A. MULLER, a citizen of the United States,res1d1ng at Madlsonville, in the county of Hamilton and State of Ohio, have invented new and useful Improvements 1n Friction-Clutches, of which the following is a specification.

This invention relates to improvements in I friction-clutches, more particularly those applicable to machine-tools.

In types of friction-clutches where toggles and springs are used total or partial accidental release is apt to occur. My improved clutch has no tendency to accidental release, its action is positive, and the clutch is symmetrical as to weight.

My invention is illustrated in the accompanying drawings, in which Figure 1 is an assembly sectional drawing of a shaft carr ing two gears provided with my improved iction-clutches and other essential parts. Fig. 2 is a plan view of friction-nut. Fig. 3 is a longitudinal section of friction-nut along the line a; a: in Fig. 2. Fig. 4 is a plan view of friction cam-sleeve. Fig. 5 is a longitudinal section of cam-sleeve along line 1 y in Fig. 4.

Referring'to the drawings, A represents the shaft, in this case having diiferent diameters at different points. Shaft A is journaled at a a in the housing At a convenient point on the shaft A is a thread a of suitable itch,

shown in the drawings as a qua ruple thread of coarse pitch. A suitably-threaded nut E is provided to operate on said thread a. Closely abutting nut E on either side are friction members G C, adapted to rotatively engage by friction transnutting-gears G and C, respectively, which are normally loose on shaft A. In the particular embodiment of my invention selected for illustration friction members G C have beveled surfaces g 0, adapted to seat closely upon beveled surfaces gc, respective of gears G and C, and pressure of thesebeveled surfaces together insures ample holding contact. Friction members G C are slidably keyed to the'shaft A by keys g 0 respectively.

Keys L L not only serve to span nut E and hold friction members G C incorrect relations to the nut and each other by the screws Z, but rotatively connect sleeve K with the shifting portions of clutches already described, while allowing lateral movement of said sleeve K.

Sleeve K is shifted in the usual way by circumferential slot is.

Nut E has on its exterior helical projections e e, preferably perpendicular to threads a on the shaft or the corresponding threads e on the interior of the'nut.

Sleeve K has in its inner surface helical grooves 7c 70, adapted to engage projections e 'e. It also has keyways 7c k adapted to re,- ceive keys L L.

Driving-gears B and H are securely keyed to the shaft A by keys I) h respectively. The whole mechanism is held in pro er relative position by nuts I I or in any 0t er convenient manner.

The operation is as follows: Sleeve K being forced to the right (see Fig. 1) toward O and being held against rotation by keys L L turns the nut E as if the top side was coming toward the observer by means of the helical recess of the sleeve bearing against the heliventing operation -of gear O. The greater the pressure on sleeve K the tighter the fit of one inner friction member in its frictionbell yet whatever the degree of pressure a plied it remains the same, Without danger o accidental release, ecause the angle of the threads a 1s within the angle of rest. No

force in the direction of the length of the shaft and normal to the diametrical plane of the nut could move the nut unless the force the nut.

cure byLetters Patent of the United States- 1. The combination of a shaft having a cal projections of the nut. This rotation of result, securing operation of gear G and pre- I claim as my invention and desire to seyoke and lever (not shown) operating in the I rot wasso great as to strip the threads or break threaded portion intermediate of its ends, a ing the latter in unison with the shifting of said pair of friction members loose on said shaft, friction members splined to said shaft and located one upon each. side of the threaded portion of sa d shaft,-a out on said shaft between the adjacent ends of the friction members and engaging said threaded portion ofthe shaft, 'a shiftahle sleeve concentric with the nut, and means whereby the nut is given a partial rotation by, and in unison with, the shifting of the sleeve.

2. A friction-clutch comprising a shaft and friction members loose thereon and spaced from each other, other friction members splmed to the shaft and located between the vfirst-named members, said shaft having an exteriorly-threaded portion located intermediate of the second-named friction members, a not engaging said threaded portion of the shaft, and adapted to endwise engage the second-named friction members, a slidable sleeve concentric with the nut, and means intermediate of the sleeve and nut for rotati l l 1 i l i y 1 sleeve.v

3. In combination with a shalt, a pair of revolving members C G, normally loose thereon, friction members C, G respectively splined to said shalt, said shaft A having an the sleeve K, in either direction longitudi' nally of said shaft.

In testimony whereof I have hereunto set my hand in presenceof two subscribing witnesses.

EDWARD A. MULLER.

\Vitnesses:

Josnrn R. GARDNER, OAR ROLL H. Rronanns. 

